Displacement in the layering viewport

After playing with the materialize module, I realized that displacement used there is actually showing up in the viewport and you can control tesselation density and displacement strength.

I assume there is a good reason, why you cannot display displacement the same way in the Layering modules viewport for texture painting?

I mean, if you could, you would essentially be able to not just texture, but also live sculpt in instamat, using all brushes and graphs, but would still be good to know if there is a way to correctly display a height map, as of know it only displays as a normal/bump layer and I´m not sure what the use of it is there (apart from using an existing heightmap for height based masking/blending).